Postmix gas ring burner

ABSTRACT

Two hollow brass toroidal elements with internally directed gas inlets and perforations direct the flow radially inward to produce a continuous thin planar flame. A disc placed between the toroidal elements prevents premixing of the combustion materials.

United States Patent [72] Inventors Joseph A. Adamski Framingham; Joseph R. Weiner, Marblehead, both of Mass.

[21 1 Appl. No. 46,367-

[22] Filed June 15, 1970 [45] Patented Oct. 5, 1971 [73] Assignee The United States of America as represented by the Secretary of the Air Force [54] POSTMIX GAS RING BURNER 2 Claims, 1 Drawing Fig.

[52] U.S.Cl

[51] Int. Cl F23d 13/40 [50] Field of Search 431/353, 354;239/132.3,398,4l7.5,428,431

[56] References Cited UNITED STATES PATENTS 999,165 7/1911 l-lerpin 431/353 Primary Examiner-Carroll B. Dority, Jr. Attorneys-Harry A. Herbert, Jr. and Ruth G. Codier ABSTRACT: Two hollow brass toroidal elements with inter: nally directed gas inlets and perforations direct the flow radi ally inward to produce a continuous thin planar flame. A disc placed between the toroidal elements prevents premixing of the combustion materials.

rosmrx ors rune BURNER BACKGROUND OF THE INVENTION This invention relates to a postmix gas ring burner and,.

more particularly, the invention is concerned with providing a continuous, uniform, thin planar flame.

In furnaces where it is necessary to maintain a high temperature planar heat zone, the systems using multiple nozzles for gas and oxygen inlets are subject to cold zones. It is very difficult to produce and maintain a consistent high temperature throughout the heated area.

SUMMARY OF THE INVENTION The present invention relates to a postmix gas ring burner, and more particularly to a ring burner comprising two hollow brass cylindrical toroidal-shaped elements providing chamber which serve as manifolds for gases. Each cylinder has an inlet on the outer circumference for the introduction of gas into the premixing manifold and a ring of perforations or serrations on the inner circumference wall which distributes the gases in a circular pattern with the gases flowing through the perforations towards the center. The cylinders are bolted together and premixing of the gases is prevented by a circular brass plate which is positioned between the two cylinders.

The object of the invention is the provision of a ring burner which minimizes radial temperature gradients, and improves produce quality. The burner can be incorporated in several different types of crystal growing systems where a consistent hot planar heat zone must be maintained. The crystals grown with the use of the ring burner of this invention are of such quality that they can be incorporated as components in devices which utilize electronically active materials.

A further object of the invention is the provision of a ring burner designed to produce an inwardly directed circular and substantially planar flame. The device has extensive use also to alloy or zone refine various materials. These and other advantages, features and objects of the invention will become more apparent from the following description taken in connection with the illustrative embodiment in the accompanying drawing.

DESCRIPTION OF THE DRAWING The FIG. of the drawing is a cross section of an exploded view of the ring burner, according to the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT The burner is indicated generally by the numeral 10. It is comprised of two toroidal hollow members 12 and 14, substantially U-shaped in cross section. One'member inverted and placed contiguously to the other makes possible the formation of a pair of chambers which function as gas manifolds. Since in this burner, premixing of the oxygen and gaseous fuel is to be avoided, a plate'l6 is placed between the abutting members 12 and 14. Each member has a gas inlet. Oxygen or gaseous material is admitted to the manifold chamber 18 through an inlet 22 and gaseous fuel is admitted through the inlet 24 to the manifold chamber 20.

The internal walls 26 and 28 of the toroidal elements 12 and 14 are provided with serrations 30 and 32 which function as inlets for the oxygen and gas to an internal central chamber where crystals are to be formed or other materials are to be processed. The disc 16 is circular to fit the external dimensions of the burner, and is provided with a central opening which conforms in diameter to the diameter of the interior abutting walls 26 and 28 of the burner. The formation of this disc prevents premixing of the gaseous elements, but also provides continuity for the central burning area. The gases, flowing through the serrations 30 and 32, form a circular flame pattern and a continuous thin planar flame which can easily be controlled by regulating the gas flow rates. The burner 10 is water cooled externally by brass tubing 34 or other expedient means. Although the invention has been described with reference to a particular embodiment it will be understood to those skilled in the art that the invention is capable of a variety of alternative embodiments within the spirit and scope of the appended claims.

We claim: I

1. A gas ring burner comprising a pair of toroidal elements, each provided with an outer circular wall and an inner circular wall forming facing annular channels functioning as manifolds, an oxygen inlet in the outer wall of one of said toroidal elements, a gas inlet in the outer wall of the other of said toroidal elements, a circular plate having a central circular opening, said plate adapted to fit between said toroidal elements to separate the manifold areas of each and to allow the formation of a central mixing and combustion chamber, the inner wall of each toroidal element being provided at its inner circumference with serrations for admitting gas from each manifold area to the central mixing and combustion area, whereby a continuous uniform thin planer centrally directed flame is produced.

2. In a device as claimed in claim 1, means for cooling said ring burner, said means comprising tubing for the containment of cooling fluid, said tubing disposed circumferentially about the exterior of each of said toroidal element. 

1. A gas ring burner comprising a pair of toroidal elements, each provided with an outer circular wall and an inner circular wall forming facing annular channels functioning as manifolds, an oxygen inlet in the outer wall of one of said toroidal elements, a gas inlet in the outer wall of the other of said toroidal elements, a circular plate having a central circular opening, said plate adapted to fit between said toroidal elements to separate the manifold areas of each and to allow the formation of a central mixing and combustion chamber, the inner wall of each toroidal element being provided at its inner circumference with serrations for admitting gas from each manifold area to the central mixing and combustion area, whereby a continuous uniform thin planer centrally directed flame is produced.
 2. In a device as claimed in claim 1, means for cooling said ring burner, said means comprising tubing for the containment of cooling fluid, said tubing disposed circumferentially about the exterior of each of said toroidal element. 